fix powerpc tail calls
fix powerpc tail calls

ucdseniordesign/avian,getlantern/avian,minor-jason/avian,marcinolawski/avian,joshuawarner32/avian,joshuawarner32/avian,bgould/avian,MaartenR/avian,ucdseniordesign/avian,getlantern/avian,bgould/avian,lostdj/avian,ucdseniordesign/avian,badlogic/avian,lostdj/avian,lwahlmeier/avian,MaartenR/avian,lwahlmeier/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,dicej/avian,joshuawarner32/avian,getlantern/avian,lostdj/avian,joshuawarner32/avian,getlantern/avian,bgould/avian,minor-jason/avian,MaartenR/avian,bigfatbrowncat/avian-pack.avian,dicej/avian,minor-jason/avian,MaartenR/avian,marcinolawski/avian,marcinolawski/avian,badlogic/avian,lwahlmeier/avian,badlogic/avian,lostdj/avian,lwahlmeier/avian,ucdseniordesign/avian,bigfatbrowncat/avian-pack.avian,badlogic/avian,bigfatbrowncat/avian-pack.avian,minor-jason/avian,dicej/avian,bgould/avian,dicej/avian